Get your taxes done using TurboTax

Well, if you cannot find your 2019 tax return, then you may be in the wrong Online account.

Once you find your correct 2019 tax return, and once you get into that tax return, you look for it here:

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You should note that  the tax software will only help you figure out what you need to pay each qtr...it will not help you actually make those payments, other than to print out mailing form vouchers.  You must pay the estimates outside of the TTX software.

I think there are a few  helpers here that have a link to outside web calculations...but I can't find it now.  You could also go to the IRS website and use their 2020 1040ES forms and worksheet